What does it mean when the yellow light on the fuel gauge illuminates?

[LaAva]

The yellow light on the fuel gauge illuminating indicates the following two situations: 1. When starting the vehicle's power supply, a self-check will be performed and then the light will go out, which is normal. The first scenario is when the car's power is turned on, the vehicle conducts a self-check. During this time, not only the engine yellow light but also other fault lights will illuminate simultaneously, then they will all turn off. This is a normal occurrence. 2. If the yellow light remains on after the car is started, it indicates an engine fault. The second scenario is when the car is started, and the engine fault yellow light stays on. This is the ECU alerting that there is a fault in the engine, which is an abnormal condition.